怎么打印出这种效果?

Question

定义一个char类型的二维数组，并遍历这个数组，使之能打印出如下效果 * *** ***** ******* ********* *********** ********* ****** **** *** *

Answer 1

@Test
public void test0() {
    //                1       3              5                   7                         9                                  11
    char[][] arr = {{42}, {42,42,42}, {42,42,42,42,42}, {42,42,42,42,42,42,42}, {42,42,42,42,42,42,42,42,42}, {42,42,42,42,42,42,42,42,42,42,42}};
    //                0        1             2                   3                         4                                   5
    
    int sum = 2;

    for(int i = 0; i<arr.length*2; i++) {
        if(i < arr.length) {
            for(int j = 0; j<arr[i].length; j++) {
                System.out.print(arr[i][j]);
            }
        }else if(i >= arr.length && i< (arr.length*2)-1) {
            for(int j = 0; j<arr[i-sum].length; j++) {
                System.out.print(arr[i-sum][j]);
            }
            sum = sum + 2;
        }   
        System.out.println();          
    }
}

Answer 2

用for和if判断一下,会更好